html,body,#app{
    height: 100%;
}

.topdiv {
    height: 70px;
    background-color: #112648;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .topspan {
    font-size: 40px;
    font-weight: bolder;
    color: #ffffff;
  }